Flat Washer Flat Washer Type SAE Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size 1 3/8 in Inside Diameter 1.5 in Outside Diameter 2 3/4 in Maximum Thickness 0.156 in System of Measurement Inch Minimum Thickness 0.156 in Color Silver Inside Diameter Tolerance 1.43-1.545 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C